An. Grigorenko, MEASUREMENT DESCRIPTION BY MEANS OF A NONLINEAR SCHRODINGER-EQUATION, Journal of physics. A, mathematical and general, 28(5), 1995, pp. 1459-1466
A new general formulation for nonlinear quantum mechanics is discussed
. It is shown that a nonlinear deterministic evolution with random var
iables can model a measurement as a dynamical process. Phases of state
vectors are treated as random variables of the theory.